Office chair



FIG. 1 is a top perspective view of an office chair, showing my newdesign;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the drawings depict portions of the office chairthat form no part of the claimed design.

CLAIM The ornamental design for an office chair, as shown and described.